Add READMEs for new examples, compress large one, update docs

examples/blink.README

@@ -0,0 +1,5 @@
+The top left three cells on layer 0 contain two 0 values and one 1. When the
+sheet is clocked, the 1 moves around cyclically among the three cells.
+
+However, you don't see any changes taking place until you interrupt this
+infinite recalculation loop explicitly.

examples/counter.README

@@ -1,3 +1,7 @@
 This sheet shows how to use clock() to model a counter which
 automatically counts up to 1000 once the sheet gets clocked with
-control-s.
+control-s/Shift-TAB (depending on teapot/fteapot).
+
+Note that the intermediate iterations are not displayed, so you will not see
+any change to the spreadsheet other than the cell becoming 1000. (In fteapot,
+if you move around while it is updating, you will see some intermediate values.)

examples/life.README

@@ -1,4 +1,10 @@
-This is a sheet which contains the well known game of life.  Load it and
-clock the sheet with control-s a few times, and you will see the glider
-moving.  Layer 0 contains the grid and layer 1 contains some help
-formulas.
+This file is maintained here as a test of reading the legacy XDR format. Because
+of changes to the value of comparison operator (it now returns Bool rather than
+int), some of the formulas would need slight tweaking for the sheet to operate
+as formerly described below in brackets.
+
+[This is a sheet which contains the well known game of life devised by
+John Conway.  Load it and clock the sheet with control-s/Shift-TAB a few
+times, and you will see the glider moving.  Layer 0 contains the grid and
+layer 1 contains some help formulas.]
+

examples/lifeby.README

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+The two files lifebyclock.tpa and lifebylayer.tpa (which needs to be gnu-
+unzipped from the distribution) update the former life.tp example to display
+teapot's color and computed style capabilities.
+
+In both files, all of the data and helper formulas are on layer 0.
+
+In lifebylayer.tpa, you can enter whatever live cells you like with the cell
+contents "1" on layer 1, making sure all non-live cells have empty contents,
+and the next 36 generations of development will be calculated on the
+succeeding layers.
+
+In lifebyclock.tpa, you can enter whatever live/non-live cells you want in the
+same fashion. However, now clocking the cell will advance the life simulation
+by one generation per iteration, for an arbitrary number of iterations.

examples/sqrt.README

@@ -1,3 +1,3 @@
 This sheet calculates the square root of x if you clock it a few times
-with control-s.  It is a nice introductional example of how to use
+with control-s/Shift-TAB.  It is a simple introductory example of how to use
 clocked expressions.